Powdery mildew of Gooseberry

From early summer, symptoms appear on gooseberry bushes as:
Powdery grey-white fungal patches on the leaves, which later turn brown
Mildew on the fruits turns brown as it ages
Young shoots are stunted and twisted at the tops, and die back
Tiny fruiting bodies (just visible as black dots) may develop within the mildew growth in late summer and autumn